Process for production of nitrogen compounds by absorption of nitrogen in a mixture of reaction



rammed Feb. 17., 1925 UNITED STATES PATENT OFF-ICEQ" o'r'ro mm, or noxormon, swmnm.

PROCESS FOR ruonuo'rron 01gmmoemt cou'roumas BY nnsonr'rxon or mrnoomw IN A MIXTURE or rmmion.

No Drawing.

To all whom it'mosg coywer'n: I Be it known that I, OTTO TuoELL, a cit1- zen of Sweden, residing at Hokopmge,

Sweden, have invented certain new and use-.

pure nitrogen in a mixtureof car on and alkali metals or alkaline earth metals, or their compounds. For, this purpose, either pulverous mixtures or briquettes or pieces of varying shapes ,have been used.

With the use (it pulverous material, however. it has proved very difficult to pass the gases through the same, and such ma.- t rial is strongly disposed to form baked masses or lumps. The pieces or briquettes produced in different pays all have a uniform hardness throughout, so that they either are hrdk'en more or less during their transport and in the shaft of the furnace before the reaction, or their great hardness will prevent the nitrogen from intruding. to the interior parts at the same time prevent ing: the gases 'iroduced by the reaction from escaping.

Atcordingto the present invention these drauhacks are avoided by the use of hriqus-ilos or grains of spheriral or substantially spherical form, the interior of said gin-on: or calls being comparatively porous in order to facilitate the passage of the gases. while their surface is shtliciently hard and smooth. to maltepossible the transport of the material or the passing thercol through a shaft of a furnace to the ehan'lber of reaclion without disaggregation or any dust hcingf raised. liy the influence ot the reactioin the hard exterior layer, -\Vl1ich is cdluparativelythin and ol a uniform thickness, ill become porous that the gases 7 can pass through thetszune without the tir1nness o t the halls being reduced to such an xtent that the balls are broken.

Application filed June 10, Serial No. 719,110.

Briqu'cttes or balls. of this type may be produced in any'known way, it being however understood that the treatment must be .would interfere with the agglome'rating operation. Insuch drying apparatus soft halls of rather irregular shape commence to he formed. From the drying apparatus the mixture is then carried to another set of rotating cylinders, through which are passed gases containing steam for keeping the degree of moisture constant. The balls now develop into hard, almost perfectly pherical grains or balls.

By using grains or balls having the pro crtics mentioned above the worst impe iments of the reaction are eliminated and the reaction inay pass even to a point corresponding ,to the (-hemic'al state of equilibrium.

\Vhat I claim is:

The recess of producing nitrogen compounds by absorption of nitrogen gas int mixtures of reaction, which consists in pas ing the nitrogen through a mixture the ingredients of which are formed into sphericai grains having a comparatively hard and smooth surface layer of a uniform thickness covering an inner porous mass pernicahle. to gasei.

in testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

()TTO TROELL.

Wi tnesse's EIN EINSON, GUNHILD Pia'rnusstm. 

